Airconditioning dilemma

Received an email from our SS this morning - they are still trying to figure out how to get the airconditioning duct into the multi room. This is due to us changing the floorplan, therefore the floor joist orientation was needed at the rear. We will need a bulkhead running across the rear to provide the air to the lower rear area and it will need to have face mount grills. Lets hope the problem is resolved soon. Carpenters should be  out tomorrow (Friday) to finish the back cladding.  Today they are expecting a very hot day so not sure if anything will happen.